Hi, I just started a new painting over an old painting (first time). The old painting was 2,5 years old. I sanded the painting (but did not take the precautions mentioned by Erna – Next time I will!). I put three layers of gesso on the old canvas, let it dry and started the new painting. It’s the first time I’m painting on gesso (Felt a little smoother than the prepared canvas I buy in the store). Not sure if I did the right things… I also believe I’m not able to buy lead-based paints in Europe (Belgium). So, is gesso not the right primer in this case? All advice and suggestions are very welcome – Thanks.